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Asian Journal of Plant Sciences
Year: 2004  |  Volume: 3  |  Issue: 1  |  Page No.: 94 - 100

Magnitude and Mechanism of Insecticide Resistance in Helicoverpa armigera Hub. Population of Tamil Nadu, India

T. Ramasubramanian and A. Regupathy    

Abstract: Survey on insecticide resistance monitoring for a period of one year indicated that the Helicoverpa armigera population of Tamil Nadu developed very high level of resistance to synthetic pyrethroids, medium level of resistance to chlorpyrifos and quinalphos, low level of resistance to endosulfan, thiodicarb and profenofos and cent per cent susceptibility to the new chemistry spinosad. Synergistic studies with piperonyl butoxide, pungam oil and profenofos clearly indicated that the common MFO mechanism was responsible for the high level resistance observed to synthetic pyrethroids.

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